The whole issue of Batman using guns has become mighty blurry. In the 70's and 80's, the rule was that he would never fire a gun. This had something to do with the repulsion he felt for them when he saw his own parents gunned down.
Now, anyone who has seen The Dark Knight or read The Dark Knight Returns knows that, while Bruce doesn't whip out a six-shooter, he has no problem using artillery fire. This is kind of like saying you won't eat meat unless you're going to eat a whole cow.
But the Batman I knew growing up would never fire a gun. This was a principle that actually put him in a death trap in Detective Comics #452, where it was "fire the gun or die":
But, for some reason, Batman didn't have that issue early in his career, like in this scene from Batman #4:
I never carry a gun... but I'll still shoot ya with one if it happens to fall into my lap. Yeah, the fact that you shot me with my own gun shows me you really stuck to your anti-gun principles there.
Also from Batman #4, Bruce was apparently a bit less guarded about the secret identity:
I know you're Batman!
Yes, this is Bruce Wayne. Who's calling, please?
More good oodles from Batman #5:
See? Bruce didn't always smoke a pipe. Sometimes he lit up a 'gert. Crime fighting is stressful work, and sometimes that sweet Carolina smoke is what the doctor ordered!
I don't know what it means to be "pardoned in your mother's hand," but if I were that guy, I'd take my chances in prison. That sounds like a scene from Oz in the making.
Okay, did you get all that? Apparently, by reading this blog, you are now enemies of all mankind. Now, get out there and cure something! Shame on each and every one of you!
Oh, I can't stay mad at you guys. We'll move on....
I dunno.... Bruce may be going there to meet some big husky Texans! It's not like the women in Gotham were much to look at....
Seriously.... I don't see him inviting her to join him down there.
And, just in case we hadn't mentioned it in a while....
Don't clown with Robin.
See you tomorrow!